In this case Variant will have the highest priorty over product and collection. That means Tier price offered at variant level will be displayed on Product Page.
Example: Offer 1: Buy 2 for 5% off – White Floral Top
Offer 2: Buy 5 for 5% off – Floral Top
Offer 3: Buy 10 for 5% off – Tops collection (including Floral Top)
Offer 1 will be applied as its Variant level offer which has highest priority.